The Effect of Low Temperatures on the Virulence of Metarhizium anisopliae (DAT F-001) to the Subterranean Scarab, Adoryphorus couloni

Rath, A. C.; Anderson, GC; Worledge, Dale; Koen, T. B.

doi:10.1006/jipa.1995.1027

Cited by 36 publications

(15 citation statements)

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“…There is close agreement between the increase in concentration and the decrease in LT 50 over the exposure time at these temperatures. Our results further support the view of Rath et al (1995a) that temperatures lower Table 2 LC 50 values for third-instar Hoplia philanthus exposed to Metarhizium anisopliae CLO 53 at 10 4 -10 9 conidia/g of soil and incubated at three temperatures for 11 weeks …”

Section: Discussionsupporting

confidence: 90%

Selection of a highly virulent fungal isolate, Metarhizium anisopliae CLO 53, for controlling Hoplia philanthus

Ansari

Vestergaard²,

Tirry

et al. 2004

Journal of Invertebrate Pathology

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Section: Discussionsupporting

confidence: 90%

Selection of a highly virulent fungal isolate, Metarhizium anisopliae CLO 53, for controlling Hoplia philanthus

Ansari

Vestergaard²,

Tirry

et al. 2004

Journal of Invertebrate Pathology

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“…Means in the same column followed by different letters abcde are significantly different (P < 0.05, Tukey test) (Yip et al 1992), optimal mycelial growth at both 5 and 378C has been recorded; this temperature tolerance characteristic has been used to differentiate strains within the genus. Similar results for temperature optima have been shown for conidial germination of other entomopathogenic fungi (Rath et al 1995). We found here that conidial germination of Lecanicillium spp.…”

Section: Discussionsupporting

confidence: 87%

Effects of temperature and water activity on Lecanicillium spp. conidia germination and growth, and mycosis of Pissodes strobi

2007

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Selecting entomopathogenic fungal isolates for use as biocontrol agents requires an assessment of their growth and virulence characteristics as affected by environmental conditions. Here we demonstrate a wide temperature and moisture range for colony growth, effective conidial germination and virulence against Pissodes strobi Peck (white pine weevil) of several isolates of Lecanicillium Gams and Zare, an entomopathogenic fungus distributed worldwide and indigenous to forests on Vancouver Island, British Columbia, Canada. In order to examine the potential Lecanicillium as a biological control agent, the pathogenicity of isolates collected from different geographical locations on P. strobi cadavers was assessed, and colony growth at different temperatures was evaluated. Colony growth was evident between 5 and 308C, with optimal growth occurring at 258C. Various combinations of water activity (0.55, 0.76, 0.85 and 0.99 a w ) and temperature (10, 15, 20, and 258C) were also used to evaluate environmental impacts on conidial germination and cumulative mycosis of adult P. strobi. Certain Lecanicillium isolates displayed xerophilic (0.85 a w ) or psychrophilic (108C) growth optima. Ultimately, identifying the abiotic limits of this entomopathogenic fungus will be used to determine which isolates have potential for future in situ biocontrol trials.

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“…Low soil temperatures often prolong the duration before mortality from mycosis is achieved. For example, in evaluating a M. anisopliae for the control of the pasture scarab beetle, Adoryphorous couloni Burmeister, in Tasmania, Rath et al (1995), observed that LT 50 values increased from 36 to 189 days when the treated insects were incubated at 5 vs. 15°C. In a Canadian study, wireworms exposed to M. anisopliae and incubated at 12°C escaped infection for over 60 days whereas those incubated at 18°C suffered considerable mortality from mycosis .…”

Section: Abiotic Factorsmentioning

confidence: 97%

“…This latter approach was tried by Inglis et al (1999). There are isolates with some degree of cold tolerance (Rath et al 1995;Li and Feng 2009) including ones that grow at 8°C (De Croos and Bidochka 1999) and this attribute may make them superior to others for the control of insects in colder situations. Temperature tolerance should be one of the criteria for candidate selection if proposed uses so justify the concern.…”

Section: Temperaturementioning

confidence: 98%

Ecological factors in the inundative use of fungal entomopathogens

2009

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Fungal entomopathogens have been developed in numerous countries as biocontrol agents with more than 100 mycoinsecticide products commercially available in 2006. The chief, perhaps sole, use of these mycoinsecticides has been as inundative agents, within a chemical paradigm. Large numbers of propagules are applied in an attempt to overwhelm by brute force many of the factors that keep a pathogen in nonepizootic equilibrium with its host. This review attempts to summarize what we know about the abiotic and biotic factors that affect the efficacy of these mycoinsecticides in both foliar and soil applications. Sunlight, humidity, temperature, and phylloplane-associated factors can affect both immediate efficacy and persistence on plants. Likewise, soil texture-moisture interactions, temperature, and a host of biotic factors can affect mycoinsecticides in the soil. Despite much research, our understanding of these ecological aspects is imperfect, especially in a holistic, dynamic sense.

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The Effect of Low Temperatures on the Virulence of Metarhizium anisopliae (DAT F-001) to the Subterranean Scarab, Adoryphorus couloni

Cited by 36 publications

References 0 publications

Selection of a highly virulent fungal isolate, Metarhizium anisopliae CLO 53, for controlling Hoplia philanthus

Selection of a highly virulent fungal isolate, Metarhizium anisopliae CLO 53, for controlling Hoplia philanthus

Effects of temperature and water activity on Lecanicillium spp. conidia germination and growth, and mycosis of Pissodes strobi

Ecological factors in the inundative use of fungal entomopathogens

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